Comparison of GIGABYTE RX 5500 XT D6 8G video card vs MSI Radeon RX 6600 XT MECH 2X 8G video card by specifications and benchmarks. GIGABYTE RX 5500 XT D6 8G runs at 1.647 GHz+ 2 % base clock speed and has 8 GB of GDDR6 memory, while video card MSI Radeon RX 6600 XT MECH 2X 8G runs at 1.968 GHz base clock speed and has 8 GB of GDDR6 memory. The TDP of the first video card is 130 W, and the second is 160 W. Compare the table of benchmark results to find out which graphic card is better.